3236687872 has 52 divisors (see below), whose sum is σ = 7061100696. Its totient is φ = 1471201280.

The previous prime is 3236687849. The next prime is 3236688001. The reversal of 3236687872 is 2787866323.

It is a super-2 number, since 2×3236687872² = 20952296761503776768, which contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9138 + ... + 80974.

It is an arithmetic number, because the mean of its divisors is an integer number (135790398).

Almost surely, 2^3236687872 is an apocalyptic number.

3236687872 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3236687872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3530550348).

3236687872 is an abundant number, since it is smaller than the sum of its proper divisors (3824412824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3236687872 is an equidigital number, since it uses as much as digits as its factorization.

3236687872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71872 (or 71850 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 52.

The square root of 3236687872 is about 56891.8963649481. The cubic root of 3236687872 is about 1479.2228498412. Note that the first 3 decimals are identical.

The spelling of 3236687872 in words is "three billion, two hundred thirty-six million, six hundred eighty-seven thousand, eight hundred seventy-two".